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    <title>NURBS Surface</title>

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<script id="script">
	setupScene();

	var degree = 3
		, knots = [0, 0, 0, 0, 0.333, 0.666, 1, 1, 1, 1]
		, pts = [ 	[ [0, 0, -10], 	[10, 0, 0], 	[20, 0, 0], 	[30, 0, 0] , 	[40, 0, 0], [50, 0, 0] ],
					[ [0, -10, 0], 	[10, -10, 10], 	[20, -10, 10], 	[30, -10, 0] , [40, -10, 0], [50, -10, 0]	],
					[ [0, -20, 0], 	[10, -20, 10], 	[20, -20, 10], 	[30, -20, 0] , [40, -20, -2], [50, -20, -12] 	],
					[ [0, -30, 0], 	[10, -30, 0], 	[20, -30, -23], 	[30, -30, 0] , [40, -30, 0], [50, -30, 0]     ],
					[ [0, -40, 0], 	[10, -40, 0], 	[20, -40, 0], 	[30, -40, 4] , [40, -40, -20], [50, -40, 0]     ],
					[ [0, -50, 12], [10, -50, 0], 	[20, -50, 20], 	[30, -50, 0] , [50, -50, -10], [50, -50, -15]     ],     ];

	var srf = verb.geom.NurbsSurface.byKnotsControlPointsWeights( degree, degree, knots, knots, pts );


    //var points = [[0, 0, 0], [20, 0, 0], [10, 10, 0], [0, 10, 5]];
    //var srf2 = verb.geom.NurbsSurface.byCorners(points[0], points[1], points[2], points[3]);

    var mesh = srf.toThreeGeometry();
    addMeshToScene(mesh, undefined,true);

	renderScene();
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